/* ========================================
   苏州皮尔篓信息技术有限公司（皮尔篓科技） - 公共样式
   配色方案：白色 + 橙色
   ======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #FF6B00;
    --primary-light: #FF8C33;
    --primary-dark: #E55A00;
    --secondary-color: #1A1A2E;
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-offwhite: #FFF5F0;
    --border-color: #E5E5E5;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 40px rgba(255,107,0,0.15);
    --transition: all 0.3s ease;
    --container-width: 1200px;
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 容器 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-outline:hover {
    background: white;
    color: var(--primary-color);
}

.btn-full {
    width: 100%;
}

/* 通用标题样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-offwhite);
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    border-radius: 30px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-gray);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 50px;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-gray);
    background: var(--bg-light);
    transition: var(--transition);
}

.pagination a:hover,
.pagination span.active {
    background: var(--primary-color);
    color: white;
}

.pagination .prev,
.pagination .next {
    width: auto;
    padding: 0 15px;
}

/* 面包屑 */
.breadcrumb {
    padding: 15px 0;
    background: var(--bg-light);
    margin-bottom: 40px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-light);
}

.breadcrumb-list a {
    color: var(--primary-color);
}

.breadcrumb-list a:hover {
    text-decoration: underline;
}

.breadcrumb-list span {
    color: var(--text-dark);
}

/* 页面标题区 */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-offwhite) 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 内页内容区 */
.page-content {
    padding: 60px 0;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 返回顶部按钮 */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #FF6B00, #E55A00);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(255, 107, 0, 0.4);
    border: none;
    color: white;
    font-size: 20px;
}

#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 107, 0, 0.5);
}

#backToTop.visible {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 28px;
    }
    
    .page-header {
        padding: 100px 0 40px;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .page-content {
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 24px;
    }
    
    .page-header h1 {
        font-size: 26px;
    }
}